From what I've heard, there are WhatsApp and Telegram groups specifically for baby playmates, not childcare-related ones, but actual meetup groups where mums bring their little ones together to socialise. Someone in my mum group mentioned that a lot of these are area-based, so it helps to search by your neighbourhood (like Tengah, Bukit Panjang, or whichever estate you're in) since the meetups tend to happen nearby. The trade-off is that some groups are more active than others, a few mums found their local ones a bit quiet, while others said theirs organise regular playground or indoor play sessions. It might be worth asking around in any existing parent chats you're already in, because new spin-off playdate groups often get shared that way rather than being publicly listed anywhere.